[1] Univ Florida, Dept Epidemiol, Gainesville, FL 32610 USA
[2] Kaiser Permanente Northern Calif, Div Res, Pleasanton, CA USA
[3] Univ Florida, Coll Nursing, Gainesville, FL USA
[4] Univ Calif San Francisco, Sch Med, Dept Epidemiol & Biostat, San Francisco, CA USA
[5] Ohio State Univ, Dept Internal Med, Div Canc Prevent & Control, Columbus, OH 43201 USA